Thiamine Mononitrate USP from China
Thiamine mononitrate is a synthetic form of vitamin B1 containing an unfused thiazole ring in its aromatic structure, classified under HTS 2934.10.10.00 as a heterocyclic compound described in additional U.S. note 3 to section VI. It is primarily used as a nutritional supplement in fortified foods and pharmaceuticals.
Duty Rate — China → United States
125%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.04.6093.5%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Verify USP or EP grade certification and provide Certificate of Analysis (CoA) confirming thiazole structure and purity >98%
• Ensure proper labeling as 'Products described in additional U.S. note 3 to section VI' for CBP clearance
• Avoid misclassification as finished vitamins (Chapter 30); ship as bulk chemical with stabilizer if needed